Signaling system



Dec. 2o, 1927,

, F. ZOGBAUM SIGNALING SYSTEM s, |L *y MAWv m h,

IIH' sigg provide 'system embodying a plurality ot' sequence Patented Dec. I20, 1927. 1

`UNITED STATES PIATIEINTv OFFICE. y

Atatami FERDINAND ZOGBAUM, OF NEW YORK, N. Y., ASSIGNOR TO `WESTERN ELECTRIC COM- PANY, INCORPORATED, OF NEW YORK,

N. Y., CORPORATION OF NEW YORK.

SIGNALDIG SYSTEM.

appiication mea January 19, 1922. seriai No. 530,275.

This invention relates to signaling systems, and particularly to s uch systems in which switches or other objects may be remotely controlled and supervised. The invention is particularly adapted for use in connection with automatic switches or circuit breakers employed with power lines.

Itis an object of the invention to provide a system of this character which includes a minimum number of operating elements, and whichl is reliable and rapid in operation.

It is another object of the invention to a remote control and supervisory relays which are operated by a series of positive and negative impulses transmitted over a common control wire and-accomplishing the supervision and'control of the various devices over a common linel wire without the use of selectors or synchronous distributors.

To this end, the invention provides a full relay system comprisinga series ot polarized relays in pairs, one relay of each pair being located at the control station and the other at the substation. The pairs of relays operate successively under the control of positive and negative impulsessupplied over a common wire `associating the two stations. The operation of each air of relays establishes for an instant a circuit which includes a control wire between the two stations, a key which is set manually or mechanically and a controlling relay. Each switch is ada ted to energize a corresponding control ing relay by means of positive or nega-lr tive current over the control wire depending. upon the position in which the switch is set.,

The controlling relay operates accordingly and controls a circuit for a signaling device 'at the control station. Certain ofthe pairs of polarized relays serve to operate thecontrolling relays at the substation, while others operate the controlling relays at the central control station. The keys at the control station are set manually. The switches at the substation are' set mechanically by the devices which are to be finally controlled and their purpose is to control the controlling relays lto selectively operate supervisory lamps.

Other'objects and advantages of theinvention will become apparent'from the following detailed description taken in connection with the accompanying drawing which shows diagrammatically one embodiment of the invention. f

Referring to the drawing, the reference letters A and B indicate, respectively, a control station and a substation ing provided with a plurality of power switches 1, 2 and 3, only three such switches being shown for the sake of clearness. In order` to indicate whether switches 1, 2 and 3 are open or closed, a number of'supervisor y 'lamps are provided at the central station,

of which lamps 4 and 5 show the position of power switch 1, lamps 6 and 7 showing the position of power switch 2, and lamps 8 and 9 servlng to indicate the position of switch 3. At station A, there are provided a plurality of manually operated keys 11, 12 and 13 which correspond to thepower switches 1,

4 and 5 being controlled by relay 18, lamps` l 6 and 7 by relay 19 and lamps 8 and 9 by relay 20. A palr of polarized relays are associated with each power switch to be con-v trolled, one of each such pair being located at station A and the other being located at station B. Such a relay 21` at station A is associated with the power switch 1 and a simi- .lar relay 22 is associated with the same switch at station B, while power switch 2 is provided with relays 23 and 24, and switch 3 is provided with relays 25 and 26. These relays are all of the polarized type having two separate windings, 'as shown in the drawing, and an armature normally held in ioo a centered position by means of suitable springs. One core of each of these relays has a non-freezing ring, such as that shown lat 27, while the opposite core is without the non-freezing ring the relays being polarized negatlvely for purposes hereinafter to be eX- 'plained .These polarized relays are adapted to beoperated successively to control there spective power switches, the lower windings of the relays being operating windings and the upper windings simply being employed' at the control station andthe other at the' rerent impulses on energizing circuit for power switch battery, through key 11, '21, conductors43 and 44,

mote station, for receiving the answer-back signal and controlling the operation of the lamp-controlling relays. @f these relays, 2S and 29 are associated with power switch 1. while relays 30 and 31 are associated with power switch 2, and relays 32 and 33 are allotted to switch 3. A neutral relay 34 is provided 'at station A. and a similar relay 1s provided at station B for controlling the lflow of current to the line wire 14 and for applying current of positive polarity to the upper'windings of the relays just described,A as will hereinafter more fully appear. Any

impulse wheel 36 is adapted to cooperate with a spring pile-up 37 and a suitable source of current to impress alternately positive and negative current impulses on thecontrol wire 10. This wheel is driven continuously at a given rate of speed by an electric mo-- tor 38 or other source of power.

The. operation of the system is as follows, assuming that the ycontrol keys. 11, 12 and 13 have been moved to the position shown in the drawmg: The rotation ci the impulse wheel 36 causes spring pile-up 37 to impress alternately` positive and negative curi control wire 10,'there being a positive and negative impulse *generated for thecontrol of each switch. For a short period at the end of the train ofimpulses, there is no current on the line wire, when the impulse wheel 36 is in the position shown in the drawing. The rst impulse transmitted is negative and operates polarized relays 21 and 22 simultaneously, causing them to attract their armatures, the circuit for relay 21 being traceable from the source of negative current, through spring pile-up 37, conductor 38', contact 39 and lower winding of relay 21 to ground; and the energizing circuit for relay 22 being established from the same source of current, through pile-up 37, control line 10, contact 40 and lower winding of relay 22 to ground. The armatures of relays 21 and 22 on becoming attracted by their contacts 41 an 42, relays holding this position throughout the duration of theimpulse. rlhis allows current to :Elow from station A establishing an y control- 1mg relay 15, such circuit extending-from contact 41 of relay contact 45 of relay 34, line wire 14, contact 46 of relay 35, conductors 47 and 48, contact 42 of relay 22, windings of relay 15 te ground..v The relay 15, being polarized, takes the position cornegative current, closesv respectively, theresponding to key 11 due to receiving positive or, as -in the present case, negative current as determined by the pos1t1on of the key. The operation of relay 15 opens or closes the remotely controlled power switch v1 in the usual manner.' On completion of the first impulse, relays 21 and 22 resume the centered or normal position shown in the drawing. The second impulse, being positive, .operates the lower portions ot' rclays 21 and 22 and in the opposite direction, repelling the armatures, leaving contacts 41 and .42 open, opening contacts 39 and 40 and closing. contacts 49 and 50, respectively. The opening of contacts* 39 and 40 cuts the lower operating windings` oi relays 21 and 22 from the control wire, the relays remaining in this' position since `the respective armatures are held against the uppermost core which yis not equipped with the non-freezing ring. By the closing of contacts 49 and 50, the same impulse, which is positive, is now permitted to liow tothe lower operating windings o relays 23 and 24 in a. direction reverse to the direction of current flow through the lower windings of relays 2l and 22, thereby causing these relays to attract their armatures to their lower pole pieces.` The energizing circuit for relay 23 is traceable from battery, through spring aile-up 37, conductor 38', contact 49 of reiay 21, conductor 52, 'Contact and lower winding of relay A23, to ground; and the energizing circuit for relay 24 being established from the same source of current, through spring 'pile-upv 37, conductor 10, contact 50 or relay 22, ,conductor 54, contact, and lower winding ofrelay 24 to ground. rllhe relays 23 and 24 operate simultaneously and in an identical manner with that just described for relays 21 and 22, but in this case, current is allowed to ow from battery at station A through hey 12, contact 56 of relay 23, conductors 43 and 44, contact 45 of relay 34, line wire 14, contact 43 of relay 35, conductors 4'? and 43, Contact 57 'of relay 24', windings of relay 16, to ground. rlhe power switch 2 is then operated. The next impulse impressed upon the line by the impulse wheel 36, being negative, again operates-relays 23 and 24 vin the opposite direction, disconnecting the operating windings of these relays from the control wire 10, and connecting relays25 and 26 to the control wire and energizes the lower windings of these `rlgaysin the Inanner'just described. 'lhe vo eration of relays 25 and 26 is similar to that described in connection with relays 21 and 22. y

The operation of relays 28-29, 30-31, and 32j-33, controlling the circuits of the indicating lamps is similar to that described forrelays 21.-22, 23-24 and 25-26, respectively, the circuit for relay 28 being .llo

lili

traceable from source of current, throughv relay 23, conductor 68, contact 69 of relay 25, conductors70 and 71, contact 80 of relay 28, lower winding of relay 28,l to ground.

The circuit for relay 29 at the station By p may be traced in a manner similar to that described for relays 22, 24 and 26. 0n the closing of the contacts corresponding to contact 60 of relay 28, current is permittedv to flow from battery at station'B through contacts corresponding to auxiliary contact 61- carried by power switch 1, through the conductor, such as 62,u contact 63 of relay 29, conductors 64 and 47, contact 46 of relay 35, line conductor 14, contact 45 of relay 34, conductors 44 and 65, contact 60 of relay 28, conductor 66, windings of lamp controlling relay 18, to ground. The relay 18, being polarized, takes the position corresponding to power switch 1 due to receiving positive or negative current, as determined by the position of that particular switch. The same impulse which causes the second operation of relays 32-and 33 operates neutral relays 34 and 35, the energizing circuit for relay34 being traceable from source of curlrent, through spring pile-up 37, conductor 38', contact 49 of relay 21, conductor 52, contact 67 of relay 23, conductor 68, contact '69 of relay 25, conductors 70 and 71, contact 72l of relay 28, 'contact 73 of relay 30, contact 74 of relay 32, winding` of lrelay 34, to ground; and the energizing circuit for a relay 35 at substation B being traceable from the same source of .Current through control wire 10 and including vthe contacts of polarized relays 22, 24, 26, 29, 31 and 33 at station Bover a circuit corresponding to that just traced for relay 34 at station A.. The operation of relays 34 and 35 opens the line wire 14 atcontacts 45 and 46 and closes Contact 7 5 of relay 34 and Contact 76 of relay 35, the closing of contact 75 causing positive current to low to the windings of the uppermost coils of relays 21, 23, 25, 28,y 30 and 32 and the closing of contact 76 causing positive current `to iiow to the windings of the uppermost coils of relays 22, 24, 26, 29, 31 and 33 thus causing all these coils which are| polarized negatively to be energized and to repel their armatures and causingthem to become disengaged from the upper pole pieces to which they are frozen. The armatures of all these relays thereupon return to the normal position shown in the ing the restoration of the other relays is to prevent current'from flowing from station 'Ato station B, or vice versa when contacts of the various relays corresponding to contact 41 of relay 21 close momentarily during this operation. .w 1t will be seen th'atby means of this invention the remote control and supervision of switches and other devices is accomplished Awithout the'use of selectors, thereby increasing the speed of operation and eliminating motor driven units at the substation, and

without the use of 'start-stop distributors thereby eliminating synchronized machines at the control station and substation. Three units of control and three of supervision only are shown, but a considerable number of additional units can be operated over the same wires, the system being practically unlimited in the number of units that may be controlled and supervised over the same pair ot wires. It is therefore not intended to limit the invention to the' specific system shown and described except within the scope of the appended claims.

l/Vhat is claimed is:

1. In combination, a control sta-tion, a remote station, a plurality of devices at the remote stationl to b e controlled from the control station, a series of relays at the control station and a corresponding series of relays at the remote station, a conductor connecting the two stations,'means for impressing impulses of currenton said conductor, means whereby responsive to these impulses the series of relays at both stations operate sequentially and in synchronism, a

second conductor connecting the two stations,

an operating relay at the remote station for each device thereat to be controlled normally disconnected from said second conductor,a key at the control station for each device to be controlled normally disconnected from the second conductor 4and associated with a source of current and means whereby said series of relayspin their sequential and synchronous operation connect in sequence the operating relays and the corresponding keys to said second conductor.

2. In combination', a control station, aremote station, a plurality of devices atV the remote station to be controlled from the control station, a series ott relays at the control station and a corresponding series ot relays at the remote station, a conductor con`` necting the two stations, means for impressing impulses of current on said conductor, means whereby responsive to these impulses the series of relays at both stations operate sequentially and in synchronism, a second conductor connecting- .the two Stations, an operating relay at the remote station for each device thereat to be controlled normally disconnected from said second conductor, a key at the control station for each device t0 iis lstation and a corresponding be controlled normally disconnected from the second conductor, sources of current of different character adapted to be associated with said second conductorby each key, and

vmeans whereby said series of relays in their sequential and synchronous operation connect in sequencerthe operated relays and the at the remote station, a conc uctor connecting 'the two stations means for im ressinff im- 7 a: pulses ot current on said conductor, means whereby responsive to these impulses the series ofrelays at both stations operate sequentially and in synchronism, a. second conductor connecting the two stations, an cpverating relay at the remote station for each device thereat to be controlled normally disconnected from said second conductor, .a key at the control station for each device to be controlled normally disconnected from the second conductor and associated with a source of current, means whereby said series of relays in their sequential and synchronous operation connect in sequence the operating relays and the corresponding keys tosaid secon'd conductor, a second series of relays at the control station and a second corresponding seriesof relays at the remote station, means whereby responsive to the impulses the second series of relays at both stations operate sequentially and in synchronism, a switch at the remote station for each device normally disconnected from said second conductor for applying current of different character thereto, a signal controlling relay at the control station for each device normally disconnected from said second conductor, and means whereby said second series of relays in their sequential and synchronous operation connect in sequence the switches and lsignal control relays to said second conductor.

4. In combination, a control station, a remote station,l a plurality of devices at the remote station to be controlled from the control station, ya series of polarized .relays at the control station and a corresponding series of polarized relays at the remote station, a conductor connecting the two stations, means for impressing positive and negative impulses of current on said. conductor, means whereby responsive to these impulses the seriesof relays atboth stations operate sequentially and in synchronism, a second conductor connecting the two stations, a polarized operating relay at the remote station for each device thereat to be controlled normally disconnected from said second conductor, a key at the control station for each device to be controlled normally rdisconnected from the second conductor, sources of current of positive and negativepolarity adapted to be associated with said second conductor by each key, and means whereby said series of relays in their sequential and synchronous operation connect in sequence the operating relays and thel corresponding keys to said second conductor,

In witness whereof, I hereunto subscribe' my name this 16th day of January, A. D. 1922.

FERDINAND zoGBAUM. 

